# US 2018/0321505 A1 · Optical unit with shake correction function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0321505 A1 - Document ID: US20180321505A1 - Status: Published application - Kind: A1 - Application number: 15/972,236 - Filed: 2018-05-07 - Published: 2018-11-08 - Earliest claimed: 2017-05-08 - Assignees: Nidec Sankyo Corporation - Applicants: Nidec Sankyo Corporation - Inventors: Shinji MINAMISAWA - Web page: https://patentgrep.com/patent/US20180321505A1 ## CPC - G02B 27/646: {compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68)} - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/682: {Vibration or motion blur correction} - H04N 23/687: {by shifting the lens or sensor position} - G03B 2205/0023: by tilting or inclining one or more optical elements with respect to the optical axis - G03B 2205/0069: using electromagnetic actuators, e.g. voice coils - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract An optical unit with a shake correction function include a movable body having an optical element, a swing support mechanism swingably supporting the movable body between a reference posture and a tilted posture, a fixed body supporting the movable body through the swing support mechanism, a magnetic swing drive mechanism structured to swing the movable body, and a posture return mechanism structured to return the movable body to the reference posture. The magnetic swing drive mechanism includes a coil and a magnet, the magnet is polarized and magnetized to have different magnetic poles in an axial line direction, the posture return mechanism includes the magnet and a magnetic member attached to a side to which the coil is fixed, and a center of the magnetic member is overlapped with a magnetizing polarized line of the magnet when the movable body in the reference posture is viewed in a radial direction. ## Claims ### Claim 1 An optical unit with a shake correction function comprising: a movable body comprising an optical element; a swing support mechanism configured to swingably support the movable body between a reference posture where an axial line previously set and an optical axis of the optical element are coincided with each other and a tilted posture where the optical axis is tilted with respect to the axial line; a fixed body which supports the movable body through the swing support mechanism; a magnetic swing drive mechanism configured to swing the movable body; and a posture return mechanism configured to return the movable body to the reference posture; wherein the magnetic swing drive mechanism comprises a coil fixed to one of the movable body and the fixed body, and a magnet fixed to the other of the movable body and the fixed body; wherein the magnet is polarized and magnetized to have different magnetic poles in a direction of the axial line; wherein the posture return mechanism comprises the magnet and a magnetic member which is attached to the one of the movable body and the fixed body to which the coil is fixed; and wherein a center of the magnetic member is overlapped with a magnetizing polarized line of the magnet when the movable body in the reference posture is viewed in a radial direction perpendicular to the axial line. ### Claim 2 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein at least a part of the magnetic member is overlapped with the magnetizing polarized line when the movable body in the tilted posture is viewed in the radial direction. ### Claim 3 (depends on 2) The optical unit with a shake correction function according to claim 2, wherein a length in the direction of the axial line of the magnetic member is longer than a length of the magnetic member in a circumferential direction around the axial line. ### Claim 4 (depends on 2) The optical unit with a shake correction function according to claim 2, wherein a length in the direction of the axial line of the magnetic member is shorter than a length of the magnetic member in a circumferential direction around the axial line. ### Claim 5 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the magnetic member is disposed on an opposite side to the magnet with the coil interposed therebetween in the radial direction. ### Claim 6 (depends on 5) The optical unit with a shake correction function according to claim 5, wherein at least a part of the magnetic member is overlapped with the magnetizing polarized line when the movable body in the tilted posture is viewed in the radial direction. ### Claim 7 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the one of the movable body and the fixed body to which the coil is fixed comprises a fixed region to which the magnetic member is to be fixed, and a fixed position of the magnetic member is capable of being changed in the fixed region. ### Claim 8 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the magnetic swing drive mechanism comprises a Hall element which is attached to the one of the movable body and the fixed body to which the coil is fixed, the Hall element is disposed between the magnet and the magnetic member in the radial direction, and the Hall element is overlapped with the magnetizing polarized line when the movable body in the reference posture is viewed in the radial direction. ### Claim 9 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the coil and the magnetic member are fixed to the movable body, and the magnet is fixed to the fixed body. ### Claim 10 (depends on 9) The optical unit with a shake correction function according to claim 9, wherein at least a part of the magnetic member is overlapped with the magnetizing polarized line when the movable body in the tilted posture is viewed in the radial direction. ### Claim 11 (depends on 10) The optical unit with a shake correction function according to claim 10, wherein a length in the direction of the axial line of the magnetic member is longer than a length of the magnetic member in a circumferential direction around the axial line. ### Claim 12 (depends on 9) The optical unit with a shake correction function according to claim 9, wherein the magnetic member is disposed on an opposite side to the magnet with the coil interposed therebetween in the radial direction. ### Claim 13 (depends on 12) The optical unit with a shake correction function according to claim 12, wherein the movable body comprises a fixed region to which the magnetic member is to be fixed, and a fixed position of the magnetic member is capable of being changed in the fixed region. ### Claim 14 (depends on 12) The optical unit with a shake correction function according to claim 12, wherein the magnetic swing drive mechanism comprises a Hall element which is attached to the movable body, the Hall element is disposed between the magnet and the magnetic member in the radial direction, and the Hall element is overlapped with the magnetizing polarized line when the movable body in the reference posture is viewed in the radial direction. ### Claim 15 (depends on 1) The optical unit with a shake correction function according to claim 1, wherein the magnetic swing drive mechanism comprises a pair of the magnetic swing drive mechanisms which are disposed on both sides with the axial line interposed therebetween, the posture return mechanism comprises two magnetic members as the magnetic member each of which is attached to the one of the movable body and the fixed body to which the coil of each of the pair of the magnetic swing drive mechanisms is fixed, and each of the two magnetic members is arranged so that a center of the magnetic member is overlapped with a magnetizing polarized line of each of the magnets of the pair of the magnetic swing drive mechanisms when the movable body in the reference posture is viewed in the radial direction perpendicular to the axial line. ### Claim 16 (depends on 15) The optical unit with a shake correction function according to claim 15, wherein the coils and the magnetic members are fixed to the movable body, and the magnets are fixed to the fixed body. ### Claim 17 (depends on 16) The optical unit with a shake correction function according to claim 16, wherein each of the magnetic members is disposed on an opposite side to each of the magnets with each of the coils interposed therebetween in the radial direction. ### Claim 18 (depends on 17) The optical unit with a shake correction function according to claim 17, wherein the movable body comprises a fixed region to which each of the magnetic members is to be fixed, and a fixed position of each of the magnetic members is capable of being changed in the fixed region. ### Claim 19 (depends on 17) The optical unit with a shake correction function according to claim 17, wherein the magnetic swing drive mechanism comprises a Hall element which is attached to the movable body, the Hall element is disposed between one of the magnets and the magnetic member facing the one of the magnets in the radial direction, and the Hall element is overlapped with the magnetizing polarized line of the one of the magnets when the movable body in the reference posture is viewed in the radial direction. ### Claim 20 (depends on 1) The optical unit with a shake correction function according to claim 1, further comprising a second magnetic swing drive mechanism configured to swing the movable body in a direction different from that of the magnetic swing drive mechanism, wherein the second magnetic swing drive mechanism comprises a second coil, which is fixed to one of the movable body and the fixed body, and a second magnet fixed to the other of the movable body and the fixed body; wherein the second magnet is polarized and magnetized to have different magnetic poles in a direction of the axial line; wherein the posture return mechanism comprises a second magnetic member which is attached to the one of the movable body and the fixed body to which the second coil is fixed; and wherein a center of the second magnetic member is overlapped with a second magnetizing polarized line of the second magnet when the movable body in the reference posture is viewed in a radial direction. ### Claim 21 (depends on 20) The optical unit with a shake correction function according to claim 20, wherein the coil, the second coil, the magnetic member and the second magnetic member are fixed to the movable body, and the magnet and the second magnet are fixed to the fixed body.